Anna De Marzi, Paolo Arosio, Federico Arosio, Giorgia Franchin, Danilo Alessio Di Stefano
{"title":"The Insertion Torque-Depth Curve Integral and Implant Micromotion: A Study on Polyurethane Foam Blocks.","authors":"Anna De Marzi, Paolo Arosio, Federico Arosio, Giorgia Franchin, Danilo Alessio Di Stefano","doi":"10.11607/jomi.11429","DOIUrl":null,"url":null,"abstract":"<p><strong>Purpose: </strong>This in vitro study aimed to investigate the relationship between the torque-depth integral (I) and implant micromotion.</p><p><strong>Materials and methods: </strong>Cylindrical and tapered-cylindrical implants were inserted into monolithic polyurethane foam blocks, featuring three different densities, after undersized, standard, oversized preparation, and the integral (I), as well as the insertion torque (IT), were measured through a torque-measuring micromotor. Micromotion was measured by applying a lateral load to abutments mounted on implants and recording displacement through a tensile testing machine. I-micromotion and IT-micromotion relationships were studied by regression analyses.</p><p><strong>Results: </strong>Significant inverse nonlinear relationships (p<0.001) were observed between (I) and micromotion, as well as IT and micromotion, across all implant designs and preparation protocols, according to a negative-power equation. No statistically significant differences were found between the slopes of (I)-micromotion and IT-micromotion curves.</p><p><strong>Conclusions: </strong>Results of the present study provide additional evidence that the torque-depth integral (I) is a reliable primary stability-measuring parameter. Yet, tests should be repeated on materials more similar to bone, and applying axial instead of lateral loads to implants.</p>","PeriodicalId":94230,"journal":{"name":"The International journal of oral & maxillofacial implants","volume":"0 0","pages":"1-22"},"PeriodicalIF":1.7000,"publicationDate":"2025-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"The International journal of oral & maxillofacial implants","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.11607/jomi.11429","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 0
Abstract
Purpose: This in vitro study aimed to investigate the relationship between the torque-depth integral (I) and implant micromotion.
Materials and methods: Cylindrical and tapered-cylindrical implants were inserted into monolithic polyurethane foam blocks, featuring three different densities, after undersized, standard, oversized preparation, and the integral (I), as well as the insertion torque (IT), were measured through a torque-measuring micromotor. Micromotion was measured by applying a lateral load to abutments mounted on implants and recording displacement through a tensile testing machine. I-micromotion and IT-micromotion relationships were studied by regression analyses.
Results: Significant inverse nonlinear relationships (p<0.001) were observed between (I) and micromotion, as well as IT and micromotion, across all implant designs and preparation protocols, according to a negative-power equation. No statistically significant differences were found between the slopes of (I)-micromotion and IT-micromotion curves.
Conclusions: Results of the present study provide additional evidence that the torque-depth integral (I) is a reliable primary stability-measuring parameter. Yet, tests should be repeated on materials more similar to bone, and applying axial instead of lateral loads to implants.